Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quando um time visitante marcou 10.8 (68), qual era o tamanho da multidão?
 ###Tabelas: CREATE TABLE channels_and_frequencies (channels_and_frequencies_id AUTO_INCREMENT PRIMARY KEY, Channel INT, Center Frequency VARCHAR, Frequency delta VARCHAR, Channel Width VARCHAR, Overlaps Channels VARCHAR) CREATE TABLE g_class (g_class_id AUTO_INCREMENT PRIMARY KEY, Ship VARCHAR, Pennant number VARCHAR, Laid down VARCHAR, Launched VARCHAR, Completed VARCHAR) CREATE TABLE minister_for_community_safety_and_legal_affairs (minister_for_community_safety_and_legal_affairs_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Entered office VARCHAR, Left office VARCHAR, Party VARCHAR, First Minister VARCHAR) CREATE TABLE round_13 (round_13_id AUTO_INCREMENT PRIMARY KEY, Home team VARCHAR, Home team score VARCHAR, Away team VARCHAR, Away team score VARCHAR, Venue VARCHAR, Crowd INT, Date VARCHAR) CREATE TABLE minnesota_counties_ranked_by_per_capita_income (minnesota_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT)  
SELECT Crowd FROM round_13 WHERE Away team score = 10.8 (68)